The outer shell of jacket Klim always impregnated DWR (durable water repellent substance), which is a substance added to the fabrics in the plant to make them resistant to rain (hydrophobic).
The durable water repellent (DWR) used by Klim always combined with waterproof and breathable Gore-Tex membrane, to avoid saturation with water of the outer layer of the fabric. This saturation, called "wetting" may reduce the breathability of the garment (moisture transfer through the film breathable) and let the water through. As DWR wears off over time, re-treatment is recommended when necessary.

The DWR coating prevents the face of the fabric to become liquid and thus reduce transpiration. However, DWR is not responsible for the waterproofing of jackets. This is a common misunderstanding, so that when the fabric is soaked in the absence of DWR, there breathability and sweat of the user will create condensation inside the jacket. This can give the impression that the jacket was leaking when physically does not exist.
The work of waterproofing products of Klim makes use of Gore-Tex membrane, which was invented in 1969 and has the ability to repel water in liquid form, while allowing water vapor to pass through it, making it a lightweight, waterproof but diapneon fabric suitable for all-weather use.

In the video below, the customer after 2-3 washes to wash the jacket, experienced the above sense moisture due to reduced performance of DWR which was almost completely removed from the fabric. To show him that the waterproofing reason for using Gore-Tex is completely irrelevant to the visual image of soaked garment and feel moisture due to lack DWR from the garment, we made the simplest of experiments ... the splash with plenty of water until soak in appearance across the outer surface and then checked for internal moisture. Of course the inner blouse was completely dry.
After an application DWR followed with ReviveX Spray and the jacket was like new !!